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Random Truck Not Pedal Pulsation

jdubub

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jdubub Senior Enthusiast

jdubub

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As some of you may know I put new front brakes on a lil over a month ago. It fixed the wheel shake and stops on a dime. The thursday before christmas I put on new shoes & drums in the rear. It stops good and fixed all noises. I now notice when slowing down SLOWLY the truck pulsates a bit at times. Not the pedal. The only thing I can think of is when i put the fronts on when i used the clamp to press in the cylinders on the caliper i loosened up the bleeder as i squeezed the cylinders in. Could air have gotten into the line a little? Does anyone know what this could be? Or is this just "normal" on these trucks?

 

Thanks in advance!

jdubub Senior Enthusiast

jdubub

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happens only after brakes are warm, when i have been in parking lot traffic

jdubub Senior Enthusiast

jdubub

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I dont think they are bad. they are brand new and the truck only does it when they are nice and hot in traffic?? so i dont know. they are wagners top of the line that they offer. When i was back home for the holidays a buddy of mine works at oreillys and gave me them at half price. But they are the best oreillys even offers. I even had him throw them on their turning machine to check and see if they were perfect...... and they were :troll:

 

If air is in the system could it cause this? bad fluid? bad master cylinder? and so on.......? If no one here knows i def do not want to take it to a shop for them to scratch their head and just make me throw money at parts :sigh:

cwendel4 Enthusiast

cwendel4

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Posted

Air could have gotten in, but then the brake pedal would be soft.

Check the rotors and see if they are grooved. I have had metal stick to the pads and groove the rotor. No idea why,but it scraps off the pads without problem.

Also, did you break in the pads? If you did not, the pads may glaze when applying the brakes lightly to stop.

 

And last, this may be normal for the pads you bought. Some pads do not function very well at light pressures and the lower temps. They work great otherwise but allow the rotor to slip past when you apply very little pressure.

jdubub Senior Enthusiast

jdubub

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  • Author
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Air could have gotten in, but then the brake pedal would be soft.

Check the rotors and see if they are grooved. I have had metal stick to the pads and groove the rotor. No idea why,but it scraps off the pads without problem.

Also, did you break in the pads? If you did not, the pads may glaze when applying the brakes lightly to stop.

 

And last, this may be normal for the pads you bought. Some pads do not function very well at light pressures and the lower temps. They work great otherwise but allow the rotor to slip past when you apply very little pressure.

 

 

FINALLY! A reply :sigh:

 

 

the pedal is not soft. i checked the rotors yesterday and they are smooth as a babies bottom. I broke in the pads per manufacturer specs. maybe with light pressure they will not function well but this is at higher temps...... after lots of stop and go traffic. I even took the pads off and they look perfect. :troll:

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